Multiple anvil for fastener setting machines



A. R. HAVENER MULTIPLE ANVIL FOR FASTENER SETTING MACHINES Filed March 21, 1959 Jan. 16, 1940.

Patented Jan. 16, 1940 p 2,l8?,517 PATENT ormcs Q MULTIPLE ANvn, FOR FAsrENEn' SETTING I MACHINES Arthur, R. Havencr, Wayland, assigno'r, to

' Judson L. Thomson Manufacturing Company,

Waltham, Mass; a corporation of ,Massachu ,setts Application March'zl,

1939, Serial no. 263,143

9 Claims (01. 218-45),

" ness of the'work, and, when this occu'rs, .the fastenors n= each groupset simultaneously will be set difi' ring degrees or tightness. When the consist fastening separate pieces togeth av fective' work because the fasteners in the thinner portions ot the werkwul' be loose.

The main object or my invention is the provision in machines of the character described, of multiple anvils which, after adjustment for the xpartiaular work to" be performed, are capabl'e of: sci adjustment to take care of inequalities of thickness in the work. I

lvlyinvention in its preferred embodiment em ploysaplurality of. anvils mounted for free vertical movement through suitable bores in a fixed plate and backed up by an oscillatory member adapted to equalize the pressure exerted on the anviis bgl setting members during the settinglof rivets or other fasteners; Thebacking meinbeiis or such form' and so mounted that undue pressureup'on one of two or more anvils causes i-tto shift in position until the pressure ofall the anvils upon it are equalized.

The backing member may be made in various *0 forms to conform to the number and arrangement of the anvils." When two anvils are used, the backing member maywbe pivotally/ mounted to oscillate so that the pressure upon the two anvils will be equalized, by the oscillation of the backingmember to compensate for the variation in the thickness oi the material. For a group i of three anvils', the backing member -m'ay be made of semi-spherical shape mounted in a suitably-formed recess, capable ortiltingin ail directions to bring about an equalizationof pressure upotrthe threeanvils; When"more than three: anvils are rouped, one or' the other of these forms maybe 'use'd; dependent upon the arrangcmentof the' an vils. i

retire accom anying drawing illustrating two forms or my invention,

Figure 1 is a side elevation of one form of multiple anvil. comprising two anvils constructed and adapted to be operated in accordance with my invention.

iation-in meanness willresult in de- Figure 2 is a vertical, sectional view on 2+2 iii-Figure l. p

Figure 3 is a top plan view of the same.

line

4.- is a side elevation of the upper portion or the two-anvilfOrm with another form of equalizing member. t

Figure '5 is a vertical, sectional view of the same on lineii-B in Figure 4. i

Figure 6 is a plan view of the same.

Figure 7 is a side elevation of the upper portion of athree-anvil form of the invention with another form of equalizing member.

' Figure 8 is a vertical, sectional view on line 5 -8 of Figure "7.

Figure 9-isa plan view of the same Referring-first to the construction shown in Figures 1 to 3, at I is indicated a bracket to the machine, for supporting the anvilsp At its outer end it is provided with a vertical bor'e 2 which receives a bushing 3 and" within this bushing is vertically movable a shank 4 This shank is threaded at 5 adjacent to its upper end and engaging therewith is" an adjusting 11111; 6,

the lower edge of which bears on the upper edge,

ofthe bushing '3. By turning this nut 6 the shank 4 may be adjusted heightwise. At its upper end this shank 4 has secured thereto a multiple anvil support I and this is held from rotation about the axis of the shank d by a rearward extension 8 which is perforated and carries a'bushi'ng 9 for. sliding engagement with a guide post H3 secured at its lower end in the bracket I. The support 1 isprovided with a base Hand upstanding spaced side wall members l2 bridged over at their upper ends by a cover member l3. Between the sides l2 there is pivotally supported on a pivot pin M a backing equalizing member $5. This equalizing member isprovided with a pairoi spaced rounded projections it on which' are' supported the botto'n'rends of a pair of anvils l! which are vertically slidable through bushings H3 in bores in a circular boss is integral with? and upstanding from the top face of the cover member l3. As shown thesejanvils have the usual spring pressed pilot's 2i? for receiving tubular rivets, although it is evident that they might be otherwise formed,

, depending upon the particular type of fastening which it is desired to set. As shown, the equalizer lfi'inay have its e'iitent of rocking motion deterinined as bya pair of abutment screws 2| threaded through the cover plate l3 above oppo other through rocking of the equalizen'thus to i equalize the pressure exerted on the two anvils, so as to take care of difierences in thickness of the work and diiferences in dimensions of the upper tools which cooperate with the anvils in setting the fasteners. These abutment screws 2| may be fixed in adjusted positions as by means of the set screws 22. It will be evident from this construction that if desired either of the setting tools may be adjusted normally higher than the other and if desired they may be locked in such relative positions without capability of rocking of the equalizer.

In Figures 4, and 6 a modified construction is shown also intended for use with a pair of anvils. In this modification the upper end of the shank 4a is shown as extended into a casing member 30 having spaced upwardly extending.

side portions 3!. The top face of the shank member 4a is provided with a semi-cylindrical slot 32 within which is rockably mounted the equalizing backing member 33. This equalizer is shown as of generally semi-cylindrical contour with a pair of rounded projections 34 on its upper otherwise fiat face. 'These projections 34 are positioned to support the anvils I! which are mounted for slidingmotion through bushings 35 seated in through and through bores in the cover plate 36, this cover plate bridging the side walls 3| and being secured thereto as by the screws 31 passing through holes in the corners of the cover plate 36 and threaded into the side wall members 3|. and the shank 4, the casing 30 may be slidably guided on the post H) as shown in Figure 2, the casing being secured to the shank as by a set screw 38.

In Figures 7, 8 and 9 a construction is shown suitable for more than two anvils, three anvils being shown. In this construction the upper end of the stem 4 is shown as provided with a socket 40 within which is rockably mounted a hemispherical equalizer 4|, the upper face of which is provided with the rounded projections 42 against which engage'the lower ends of the anvils [1. As these anvils are shown arranged in triangular grouping about a central vertical axis, the projections 42 on the equalizer are similarly arranged. As the equalizer or backing member may tilt in any direction, being universally' mounted, the pressure is equalized between all If three of the anvils. The casing 43 which houses the equalizer 4| may be identical in construction with that shown in Figures 4, 5 and 6, except that its cover 44 will have three hushed openings to receive the three anvils l1. It may be secured to the stem 41) as by a set screw 45 in the same manner that the casing 30 is secured to the stem 4a in the construction of Figures 4 to 6.

From the foregoing description of certain embodiments of this invention, it will be evident to those skilled in the art that various changes and modifications might be made without depart-- ing from the spirit or scope of this invention as on said anvils during a setting operation.

To prevent turning of the casing 30 2. An anvil of the character described comprising a support, a plurality of parallel anvils mounted in said support for free longitudinal movement, and an oscillatory member mounted in said support in engagement with the back ends of said anvils for equalizing the pressure thereon during a setting operation.

3. An anvil of the character described comprising a support, a plurality of parallel anvils mounted in said support in close proximity to each other and longitudinally movable therein, and an oscillatory member mounted in said support for engaging the bottom ends of said anvils for equalizing thepressure thereon during a setting operation.

4. An anvil of the character described comprising a support provided with a plurality of parallel bores open at both ends, an anvil mounted in each of said bores and longitudinally movable therein, and an oscillatory member mounted in said support for engaging the bottom ends of said anvils for equalizing the pressure thereon during a setting operation.

5. An anvil of the character described comprising a support, a pair of anvils mounted in said support for longitudinal movement therein, and an oscillatory member pivotally mounted in said support for engaging the bottom ends of said anvils for equalizing the pressure thereon during a setting operation.

6. An anvil of the character described comprising a support, three parallel anvils mounted in said support for longitudinal movement there,-

in, and an oscillatory member'of semispherical pressure exerted on said anvils during a setting operation, and means for limiting the amplitude of oscillation of said member.

8. An anvil of the character described comprising a plate provided with a plurality of parallel vertical through and through bores, an anvil slidably mounted in each of said bores, and a backing member mounted below said plate and having an approximately horizontal top face for supporting said anvils in said bores, said member being mounted for a tilting movement for equalizing the pressure exerted on said anvils during a setting operation.

9. An anvil of the character described comprising a plate provided with a plurality of parallel vertical through and through bores, an anvil slidably mounted in each of said bores, and a backing member mounted below said plate and having an approximately horizontal top face for supporting said anvils in said bores, said member being mounted for a tilting movement for equal- 

